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POST-ATTACK INJECTION OF SILVISAR 510 (CACODYLIC ACID) IN SPRUCE BEETLE (COLEOPTERA: SCOLYTIDAE) INFESTED TREES

Published online by Cambridge University Press:  31 May 2012

R. H. Frye ,
J. M. Schmid ,
C. K. Lister  and
P. E. Buffam
R. H. Frye
Affiliation:
Branch of Forest Pest Control, Rocky Mountain Region, Denver, Colorado 80225
J. M. Schmid
Affiliation:
Rocky Mountain Forest and Range Experiment Station,1U.S. Department of Agriculture, Forest Service, Fort Collins, Colorado 80521
C. K. Lister
Affiliation:
Branch of Forest Pest Control, Rocky Mountain Region, Denver, Colorado 80225
P. E. Buffam
Affiliation:
Environmental Quality Evaluation, Southeastern Area State and Private Forestry, U.S. Forest Service, Atlanta, Georgia 30309
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Abstract

Post-attack injections of full- and half-strength Silvisar 510 (cacodylic acid) appear to inhibit populations of Dendroctonus rufipennis (Kirby) more effectively than quarter- and tenth-strength dilutions. Arsenic concentrations in the phloem were highest in the full-strength treatments and progressively decreased in the lesser strength treatments. Arsenic concentrations in the phloem were generally highest just above the frill while concentrations at 20 ft and higher above the frill were significantly lower than those just above the frill. Arsenic concentrations in the needles were highest in the full- and half-strength treatments and decreased progressively in the lesser strength treatments. Concentrations in the needles were essentially equal in the upper and lower portions of the crown. Arsenic concentrations in the soil were not affected by the treatments.

Type
Articles
Information
The Canadian Entomologist , Volume 109 , Issue 9 , September 1977 , pp. 1221 - 1225
Copyright
Copyright © Entomological Society of Canada 1977

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